PSI PVC-Coated Metallic Pipeline Casing Spacers-Isolators (Model C)

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PSI PVC-Coated Metallic Pipeline
Casing Spacers-Isolators (Model C)
with T.P.E. Liner
By Pipeline Seal & Insulator, Inc.

Electrical separation of carrier pipes from the surrounding casing when
strength and excellent corrosion resistance are your main concerns.

Description

PSI Model C Coated Casing Isolators are used to electrically separate carrier pipes from the casings through which they pass.

PSI polyvinyl chloride coated (PVC) casing isolators are often selected due to their strength and excellent corrosion resistance. An extremely tough and durable heat-fused PVC coating is offered on steel casing isolators 4" and larger, with 12" wide bands. The cold-formed steel casing isolator band, complete with runner studs installed, is vapor degreased, primed, heated and fusion coated with plastic, providing a minimum .010" (0.254 mm) thick coating over the entire band and runner studs. A post-cured cycle strengthens the bond and provides an even more uniform coating. Polyvinyl chloride is available as standard. Other heat fused plastic coatings are also available for custom orders and applications.

Runners are attached with 3/8" diameter studs, which are fusion-welded to the band before it is PVC coated. They are recessed far below the wearing surface of the runner. After the runner is anchored to the band, the stud counter-bore is filled to assure a water-tight seal for the stud and the lock fastener.

Benefits / Features

Low labor costs -- may be installed by one person
(see installation instructions).
Glass reinforced runners offer coefficient of friction = 0.1 to 0.6.
Glass reinforced polymer runners offer 18,000 PSI (1,265 kg/cm²) compressive strength.
Riser height may be specified for specific positioning of carrier pipe within casing.
High-temperature T.P.E. inner liner protects pipe and/or coating.
Liner offers excellent corrosion resistance and back-up insulation.
May be used for long pulls and/or heavy pipe installations.
Designed to last for the life of the piping system.
Deeply embossed flanges offer added strength during tightening of flange bolts.
Eliminates need for blown sand or pea gravel.
Available with 12" bands.
Available with 2" wide runners.

Material Specifications for Coated Casing Spacers

Band	14 Gauge (0.074"[1.88mm]) hot-rolled and pickled mild steel. Flanges of the spacer are deep embossed, and the corners are chamfered.
Configurations	4" (101.6 mm) through 36" (914mm) = 2-piece 36" (914 mm) through 48" (1,219mm) = 3-piece 48" (1219 mm) and over = Consult Factory
Finish	Type: Fusion Bonded PVC Coating
	Hardness: Durometer - shore A2 (10 sec) (ASTM D1706-61T): 80
	Maximum Operating Temperature (constant): 150°F (65°C)
	Aging Properties: Excellent
	Electrical Properties (ASTM D149-61) (short time 0.010"): 1380 V/mil
	Environmental Resistance: Salt Spray (ASTM B117): Excellent Acids: Good Alkalies: Good
Liner	Material: T.P.E.
	Thickness: 0.118" (3.0 mm) min.
	Hardness: Durometer "A" 73
	Dielectric Strength, 1/8" (3.18mm) Surge Test: 60,000 V min. Dielectric Strength, Step-by-Step Test: 58,000 V min.
	Water Absorption: 1% max.
Risers	10 Gauge (0.135mm) steel MIG welded to band.
Runner Types	2" (51 mm) wide glass-reinforced polymer runners 4" (101.6mm) through 12" (305 mm) = 2 top & 2 bottom 14" (356mm) through 36" (914 mm) = 2 top & 4 bottom
Runner Specifications	Tensile Strength, (ASTM D638): 17,600 psi (1,237kg/cm²) Flexural Strength, (ASTM D790): 25,300 psi (1,779kg/cm²) Compression Strength, (ASTM D648): 18,000 psi (1,266kg/cm²) (10% Deformation) Deflection Temp. @ 264 psi, (ASTM D648): 405°F (205°C)
Studs, Nuts & Washers	Studs = 5/16" - 18 x 2-1/2" plated Hex Nuts = 5/16" Washers = 5/16" SAE 2330
Band	12" (305 mm) Band = 8 studs, 16 nuts and washers
Warranty	Products are warranted against failure caused by manufacturing defects for a period of one year.

Ordering Information

To order Coated Casing Isolators, please indicate the following:

Quantity
Type Finish
Band Width
Runner Width
T.P.E. Liner
Carrier Pipe O.D. (type and coating thickness if applicable)
Casing Pipe I.D. (type and coating thickness if applicable)
Carrier Pipe Joint O.D. (if applicable)
Carrier Pipe Position within Casing
Length of Crossing

Example:

Type Finish	Band Width	Runner Width	Carrier Pipe O.D.	Casing Pipe I.D.	Carrier Pipe Joint/Bell O.D.	Position Within Casing
C = Coated	12 = 12" band	G-2 = 2" wide glass-reinforced runners	Indicate actual dimension including coating			S =Standard C = Centered CR = Centered / restrained NCR = Non-centered / restrained
Example: Coated 12" (305 mm) wide steel band casing spacer with 2" (50.8 mm) wide glass-reinforced polymer runners for a 16" (406 mm) ductile iron pipe with a 17.40" (442 mm) outside diameter within a casing pipe with 23.25" (590 mm) inside diameter, carrier pipe joint O.D of 20.00" (508 mm), standard position.
C	12	G-2	17.40	23.25	20.00"	S